Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV
文献类型：期刊论文
| 作者 | Adamczyk, L.1; Adkins, J. K.23; Agakishiev, G.21; Aggarwal, M. M.34; Ahammed, Z.53; Alekseev, I.19; Alford, J.22; Anson, C. D.31; Aparin, A.21; Arkhipkin, D.4 |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2013-07-03 |
| 卷号 | 88 |
| ISSN号 | 0556-2813 |
| DOI | 10.1103/PhysRevC.88.014902 |
| 文献子类 | Article |
| 英文摘要 | Measurements of the elliptic flow, upsilon(2), of identified hadrons (pi(+/-), K-+/-, K-s(0), p, (p) over bar, phi, Lambda, (Lambda) over bar, Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+)) in Au + Au collisions at root s(NN) = 7.7, 11.5, 19.6, 27, 39, and 62.4 GeV are presented. The measurements were done at midrapidity using the time-projection chamber and the time-of-flight detectors of the Solenoidal Tracker at RHIC experiment during the beam-energy scan program at Relativistic Heavy Ion Collider. A significant difference in the upsilon(2) values for particles and the corresponding antiparticles was observed at all transverse momenta for the first time. The difference increases with decreasing center-of-mass energy, root s(NN) (or increasing baryon chemical potential, mu(B)), and is larger for the baryons as compared to the mesons. This implies that particles and antiparticles are no longer consistent with the universal number-of-constituent quark (NCQ) scaling of upsilon(2) that was observed at root s(NN) = 200 GeV. However, for the selected group of particles (p(+), K+, K-s(0), p, Lambda, Xi(-), Omega(-)) NCQ scaling at (m(T) - m(0))/n(q) > 0.4 GeV/c(2) is not violated within +/- 10%. The upsilon(2) values for f mesons at 7.7 and 11.5 GeV are approximately two standard deviations from the trend defined by the other hadrons at the highest measured p(T) values. |
| WOS关键词 | RELATIVISTIC NUCLEAR COLLISIONS ; HEAVY-ION COLLISIONS ; QUARK-GLUON PLASMA ; STRANGE PARTICLES ; STAR ; COLLABORATION ; ANISOTROPY ; SIGNATURE ; ENERGY ; MODELS |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000321270800003 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://119.78.100.186/handle/113462/48195]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Adamczyk, L. |
| 作者单位 | 1.AGH Univ Sci & Technol, Krakow, Poland 2.Argonne Natl Lab, Argonne, IL 60439 USA 3.Univ Birmingham, Birmingham, W Midlands, England 4.Brookhaven Natl Lab, Upton, NY 11973 USA 5.Univ Calif Berkeley, Berkeley, CA 94720 USA 6.Univ Calif Davis, Davis, CA 95616 USA 7.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 8.Univ Estadual Campinas, Sao Paulo, Brazil 9.Cent China Normal Univ HZNU, Wuhan 430079, Peoples R China 10.Univ Illinois, Chicago, IL 60607 USA |
| 推荐引用方式 GB/T 7714 | Adamczyk, L.,Adkins, J. K.,Agakishiev, G.,et al. Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV[J]. PHYSICAL REVIEW C,2013,88. |
| APA | Adamczyk, L..,Adkins, J. K..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,...&STAR Collaboration.(2013).Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV.PHYSICAL REVIEW C,88. |
| MLA | Adamczyk, L.,et al."Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV".PHYSICAL REVIEW C 88(2013). |
入库方式： OAI收割
来源：近代物理研究所
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